Dear Martin,
As a rule the seismogenic zone is usually constrained by the depth
to the brittle-ductile transition and consequently its depth is strongly
dependent on the geothermal gradient, and composition (quartz versus
olivine dominated rheology). However in practise this means a depth of
between 10 and 15 km for most tectonic settings. You might like to see
papers by Zuber et al. (1986; JGR, v. 91, p. 4826) and Fletcher and Hallet
(1983; JGR v. 88, p. 7457)
Peter
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Peter Clift
Department of Geology and Geophysics
MS#22, Woods Hole Oceanographic Institution
Woods Hole, MA 02543, USA
[log in to unmask]; Tel (508) 289 3437; Fax (508) 457 2187
Web page: http://www.whoi.edu/pclift/PChomepage.html
* Sedimentary Geology * Plate Margin Tectonics *
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